The main issue with tyres that wide is interference with the spring perch - both front and rear - something you should have noticed by now! You can easily feel the clearance between spring perch and tyre with your hand. I can't get my fingers between there with my 225X75-16 MTRs on Honda Pilot rims.
The diameter of the 235X70-16s is about 29 inches which is between the 225X70-16 (28.4) and the 225X75-16 (29.3) so you may be OK under most conditions. But, you should expect some rubbing with it loaded heavy or when stuffing a wheel off-road.
Good luck!
Brian
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